Here is the link for some of the books that may be of help for your prelims preparation. Books related to Karnataka History and Geography are not available in e-commerce website. We regret the same.
Read the review of the books before buying. We however donot recommend any specific books. Your discretion is required!!!!
2. INDIAN CONSTITUTION AND POLITY
4. INDIAN ECONOMY
6. SCIENCE AND TECHNOLOGY
8. GIST OF NCERT
9. OBJECTIVE QUESTION PRACTICE BOOKS
11. PRACTICE QUESTIONS
12. COMPREHENSIVE PAPER 1 AND 2
13. GOVERNMENT SCHEMES AND POLICY